[loveheaven]

Originally Posted by kovidgoyal

Yes you can do that with the development method, though you dont even need that you can create editor plugins.

https://manual.calibre-ebook.com/creating_plugins.html

And see some of the existing editor plugins for examples

Thank you, Kovid, you are very nice.
now I have modified the source code of Calibre and I can see the modification I want when I executed "calibre-debug --edit-book". but I cannot publish the modification into the installed calibre's book editor in MacOS. so when I launch the calibre's book editor from MacOS's system context menu, it is still the default book editor without my modification.
How can I publish the modification?